港珠澳大桥英语演讲pptPPT课件下载推荐.ppt

港珠澳大桥英语演讲pptPPT课件下载推荐.ppt

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HongKong-Zhuhai-MacaoBridgetomaketheworldconvenientSuperEngineeringSuperEngineering姓名日期Contents4、TheImmersedTubeTunnel2、FeaturesandDifficulties5、TheSignificances1、BriefIntroduction3、TwoArtificialIslands3.工程总体方案lThefirstmajorcombinedbridgeandtunnelsea-crossingprojectinChina.lCostapproximatelyRMB105billion.lConstructionbeganin15December2009atZhuhai.lWillreducetraveltimefromHongKongtoMacauorZhuhaifromoverthreehourstojusthalfanhour.1.BriefIntroductionHongKongZhuhaiMacauBridge:

@#@theworldslongestsea-crossingbridge,oneofthemostchallengingconstructionsofitskindundertakenintheworldtodate.lTwoartificialislandslAnimmersedtubetunnellTheY-shapedbridge1.BriefIntroductionlTotallenght:

@#@49.97kilometerslUnderwatertunnel:

@#@6.7kilometerslBridgeoverthesea:

@#@23kilometersMacauLinkRoadZhuhaiLinkRoadOffshoreBridge-and-TunnelHKLinkRoadHKport1.BriefIntroduction1.thelifespanofthebridgeissetat120years.2.Itreportedlycanstandmagnitude-8earthquake,scale-16typhoonaswellasthecollisionwitha300,000-tonship1.BriefIntroductionthisprojectfeaturesadesign-and-buildcontract,coordinationofthethreeregionalgovernmentsintheconstructionandmanagement,andcloseattentionfromthesociety.Moreover,thereareenvironmentalconstraintsasthealignmentrunsacrossthenationalconservationareafortheChinesewhitedolphins,aswellascomplicatednavigationtrafficconditionsastheroutecrossesthebusiestshippingareaoftheLingdingSea.2.FeaturesandDifficultiesHongKong-Zhuhai-MacaoBridgeisthenationalkeyprojectfeaturedwithstrategicsignificance,largeinvolvement,highlydifficultlevelofconstruction,longconstructiontime,highrequirementontechnicaldesignandenvironmentalprotection,manyparticipantparties,complexmanagementandcoordination.2.FeaturesandDifficulties3.TwoArtificialIslandstheWestArtificialIslandtheEastArtificialIslandTheEastIslandhas59roundsteelcylinders圆钢筒.TheWestIslandhas61roundsteelcylinders.Thediameterofasinglecylinderis22.0m,andthecylinderwallis16mmthick.Theheightofroundsteelcylinderis40.5mto50.5m.Theroundsteelcylinderweighs445tto507t.3.TwoArtificialIslands4.TheImmersedTubeTunnelThewaterresistanceratiomustbelimitedto10%topreventaccumulationofsedimentattheLingdingyangChannel,otherwiseitwillimposeseriousimpactonthePearlRiverflowpathandflood-dischargecapacity,accordingtoagovernmentreport.Duetothelongdistancesbetweenthecities,theprojectisactuallyaseriesofbridgesandtunnels,connectedbyartificialislands，thiswasthefirsttimeChinahasbuiltanimmersedtubetunnel（沉管隧道）inopenwaters.The33tubeswillcomposea5.6-kilometerimmersed-tubetunnel,whichisdesignedtobeanimportantpartofthebridge.Eachofthetube,withaweightof80,000tonsandalengthof180meters,takesabouttwomonthstobuild.4.TheImmersedTubeTunnel5.TheSignificancesBritishnewspaper“TheGuardian”namedthemegastructureoneofits“sevenwondersofthemodernworldnearcompletion.”ItwillbethefirstnewlandtransportlinkbetweentheeastandwestcoastsofthePearlRiver,ThebridgewillbenefittheeconomicdevelopmentofthewholeoftheDelta.Thebridgewillcreatearegionaltransportnetwork,improvinguponwhatisconsideredtobeaweaklandtransportnetworkcurrentlyinplaceTheEnd!

@#@Thanksforyourattention!

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